1 . 如图,有两块量角器完全重合在一起(量角器的直径
,圆心为
),保持下面一块不动,上面的一块沿
所在的直线向右平移,当圆心与点
重合时,量角器停止平移,此时半
与半
交于点
,连接
.
与半
有怎样的位置关系?请说明理由.
(2)在半
的量角器上,
、
点的读数分别为
、
时,问点
在这块量角器上的读数是多少?
(3)求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
(2)在半
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235d495d88b8e51f89e2e4da27328025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)求图中阴影部分的面积.
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2022-12-15更新
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5卷引用:2022年四川省南充市中考数学模拟试题
2022年四川省南充市中考数学模拟试题2023年河南省南阳市镇平县六校联考中考数学三模试题河北省廊坊市第十六中学2023-2024学年九年级上学期月考数学试题2024年江苏省连云港市东海县四校联考中考一模数学模拟试题(已下线)热点08+圆(13大题型+满分技巧+限时分层检测02)-2024年中考数学【热点·重点·难点】专练(江苏专用)
解题方法
2 . 如图,已知
,
为
的直径,过点A作弦
垂直于直径
于F,点B恰好为
的中点,连接
,
.
![](https://img.xkw.com/dksih/QBM/2022/6/6/2997906919137280/3125049086681088/STEM/342dcdc266cd441da3a087844c4beb9d.png?resizew=150)
(1)求证:
;
(2)若
,求
的半径;
(3)在(2)的条件下,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2022/6/6/2997906919137280/3125049086681088/STEM/342dcdc266cd441da3a087844c4beb9d.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2291de85a2a29ff360a4515cce99c804.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941eba4dbc1094107e1eeb02c8d8cd56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)在(2)的条件下,求阴影部分的面积.
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2022-12-06更新
|
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9卷引用:2020年广东省深圳市龙岗区九年级二模数学试题
2020年广东省深圳市龙岗区九年级二模数学试题广东省深圳市龙岗区2019-2020学年九年级下学期调研数学试题贵州省贵阳市2022年中考数学模拟卷(四)(已下线)第3章 圆的基本性质(B卷·能力提升练)-【单元测试】2022-2023学年九年级数学上册分层训练AB卷(浙教版)2022年山东省临沂市九年级中考数学全真模拟试题(一)(已下线)第二十四章 圆(A卷·知识通关练)-【单元测试】2022-2023学年九年级数学上册分层训练AB卷(人教版,广东专用)(已下线)第05课时 正多边形与圆、扇形的弧长与面积-2022-2023学年九年级数学上册同步考点知识清单+例题讲解+课后练习(人教版)第二十八章 圆 28.5 弧长和扇形面积的计算冀教版九年级上册课后作业(已下线)2024年湖北省初中学业水平考试一模考试数学试题及变式题21-24题
3 . 如图,在
中,
为
的直径,PA与
相切于点A,点C在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/13244c20-036a-4a91-9c4e-0a417b5d8b06.png?resizew=297)
(1)求证:
与
相切;
(2)过点C作
,交
于点D,若
,则图中阴影部分的面积为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eea328811717ab763fe1f97babcc754.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/13244c20-036a-4a91-9c4e-0a417b5d8b06.png?resizew=297)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7085ecc71465a59cf36c2a57b7d89e.png)
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2022-12-04更新
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2卷引用:江苏省南京市秦淮区2022-2023学年九年级上学期期中数学试题
4 . 如图1,已知扇形纸片
,
,半径
.
![](https://img.xkw.com/dksih/QBM/2022/11/8/3105245088169984/3123446760210432/STEM/4e5b21e74dc24746b547bf17f2af0726.png?resizew=462)
(1)求扇形
的面积
及图中阴影部分的面积
;
(2)如图2,在扇形
的内部,
与
,
都相切,且与
只有一个交点
,此时我们称
为扇形
的内切圆,试求
的面积
;
(3)如图3,在扇形纸片
中,剪出一个扇形
,若用剪得的扇形纸片
围成一个圆锥的侧面,能否从剪下的余料中,再剪出一个圆作为这个圆锥的底面,并使得这个圆锥的表面积最大,若能,请求出这个圆锥的表面积;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2d3f02cb9007cd4a90ea30f6dd8181.png)
![](https://img.xkw.com/dksih/QBM/2022/11/8/3105245088169984/3123446760210432/STEM/4e5b21e74dc24746b547bf17f2af0726.png?resizew=462)
(1)求扇形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7f1d08cee99482a7241fc5637a7c32.png)
(2)如图2,在扇形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
(3)如图3,在扇形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
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2022-12-04更新
|
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3卷引用:江苏省泰州市兴化市2022-2023学年九年级上学期期中数学试题
江苏省泰州市兴化市2022-2023学年九年级上学期期中数学试题(已下线)第19讲 弧长及扇形的面积-【帮课堂】2022-2023学年九年级数学下册同步精品讲义(北师大版)江苏省泰州市兴化市大垛中心校2022-2023学年九年级上学期11月月考数学试题
5 . 如图,在锐角三角形
中,分别以三边
为直径作圆,记三角形外的阴影面积为
,三角形内的阴影面积为
,在以下四个选项的条件中,不一定能求出
的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/982f27cc-4fae-4cf9-91a5-d23d158571ee.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a6936a0a7379a7dd2331182696712a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38c43d922840f5f7693007beeb62b34.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/982f27cc-4fae-4cf9-91a5-d23d158571ee.png?resizew=149)
A.已知![]() |
B.已知![]() |
C.已知![]() ![]() |
D.已知![]() ![]() |
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6 . 2000多年来,人们对勾股定理的证明频感兴趣,不但因为这个定理重要、基本还因为这个定理贴近人们的生活实际所以很多人都探讨、研究它的证明,新的证法不断出现,如图2是将图1中的直角三角形通过旋转、平移得到的正方形
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/42ddb23e-9c05-4829-a0ad-0b1a74cb7520.png?resizew=401)
(1)请你利用图2证明勾股定理;
(2)如图3,以
为直径画圆O,延长
交
于点E,判断直线
与⊙
的位置关系,并说明理由;
(3)若
,则图3中阴影部分的面积为____________(用含a的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/42ddb23e-9c05-4829-a0ad-0b1a74cb7520.png?resizew=401)
(1)请你利用图2证明勾股定理;
(2)如图3,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd04c6b9cc47521108979a622c2b7c83.png)
您最近一年使用:0次
名校
7 . 如图,
是
的直径,C、D是
上两点,且D为弧
中点,过点D的直线
交
的延长线于点E,交
的延长线于点F,连接
.
是
的切线;
(2)若
的半径为2,求阴影部分的面积;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105f8109ad877091b4edb665fb702779.png)
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4卷引用:新疆维吾尔自治区新疆师范大学附属中学2021-2022学年九年级上学期期末数学试题
新疆维吾尔自治区新疆师范大学附属中学2021-2022学年九年级上学期期末数学试题山东省济宁市梁山县2022-2023学年九年级上学期期末数学试题甘肃省武威市凉州区武威第二十四中学2022-2023学年九年级下学期6月月考数学试题(已下线)专题09 直线与圆的位置关系(4大易错点分析)-备战2024年中考数学考试易错题(浙江专用)
名校
8 . 如图,在
中,
,
,点O是边
的中点,半圆O与
相切于点D、E,若阴影部分的面积为
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/5c6a2871-6384-41e7-95aa-1c4126d77d5f.png?resizew=245)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cbe15da3f402bccc5ff4b8f8b6d61a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1816fb0bed72025e79aa4b7185055ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9303b41310b6bf2a5fe9b66dfcd7fcb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/5c6a2871-6384-41e7-95aa-1c4126d77d5f.png?resizew=245)
A.![]() | B.![]() | C.2 | D.![]() |
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3卷引用:新疆维吾尔自治区乌鲁木齐市第七十中学2021-2022学年九年级上学期期末数学试题
名校
9 . 如图,等边△
内接于圆
中,已知
点坐标为(
,0),圆
交y轴正半轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/86d26ee5-ac73-4618-8995-e02f04668a2b.png?resizew=397)
(1)请直接写出点
、
的坐标;
(2)如图1,过点
作圆
的切线交y轴于点
,求图中阴影部分的面积;
(3)如图2,点
为
中点,连接
,
、
分别在线段
和y轴正半轴上,且满足
,连接
交
于点
,当△
为等腰三角形时,试求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671b087abb1d2692c8be5b16846c4690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f411a59b236e1e7feeae064ef31cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/86d26ee5-ac73-4618-8995-e02f04668a2b.png?resizew=397)
(1)请直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
(2)如图1,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671b087abb1d2692c8be5b16846c4690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60dc9f8e47e78b7f4ab2dd9cd559f601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eacd9c1ce5e65fec29c32f40d86b73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdf79f40252d51be11d08a0b9b44b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd71a8cbe8d1da754b8b4ed18bb0048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eacd9c1ce5e65fec29c32f40d86b73d.png)
您最近一年使用:0次
22-23九年级·全国·单元测试
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10 . 如图,一个较大的圆内有15个半径为1的小圆,所有的交点都为切点,图中阴影为大圆内但在所有小圆外部分,则阴影部分的面积为________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/c73527db-74f1-4409-aca8-a36ecde770b2.png?resizew=159)
您最近一年使用:0次
2022-09-29更新
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521次组卷
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4卷引用:第二十四章 圆(B卷·学霸加练卷,难度★★★★★)-【单元测试】2022-2023学年九年级数学分层训练AB卷(人教版)
(已下线)第二十四章 圆(B卷·学霸加练卷,难度★★★★★)-【单元测试】2022-2023学年九年级数学分层训练AB卷(人教版)2023年河南省河南师范大学附属中学九年级3月份中招模拟数学试题河南省开封市龙亭区河南大学附属中学2022-2023学年九年级下学期3月月考数学试题2022年上海市上海中学自主招生数学试题